Volume 11, Issue 1 (International Journal of Optics and Photonics (IJOP) Vol 11, No 1, Winter-Spring 2017 2017)                   IJOP 2017, 11(1): 3-18 | Back to browse issues page


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Sanaee M, Zarifkar A. Enhanced Modulation and Noise Characteristics in 1.55 µm QD Lasers using Additional Optical Pumping. IJOP. 2017; 11 (1) :3-18
URL: http://ijop.ir/article-1-270-en.html
PhD Department of Communications and Electronics, School of Electrical and Computer Engineering, Shiraz University
Abstract:   (1047 Views)

The modulation response, relative intensity noise (RIN) and frequency noise (FN) characteristics of quantum dot (QD) lasers are investigated theoretically in the presence of an external optical beam. Using small signal analysis of the rate equations for carriers and photons, it is demonstrated that by injecting excess carriers into the QDs excited state through optical pumping, the modulation response of QD laser enhances and its bandwidth increases. The external optical pump also helps QD laser to turn on during shorter delay time. Further, it is deduced that the RIN level of QD laser reduces and the damping factor increases due to external beam. Moreover, the frequency noise level of QD laser and correspondingly its linewidth decreases by applying the optical beam.

Full-Text [PDF 948 kb]   (835 Downloads)    
Type of Study: Research | Subject: Special
Received: 2016/05/15 | Revised: 2016/08/15 | Accepted: 2016/09/7 | ePublished ahead of print: 2017/01/28 | Published: 2017/01/28

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